| Pomponne | |
| Commune Status: | Commune |
| Adjustable Map: | Map commune FR insee code 77372.png |
| Coordinates: | 48.8844°N 2.6892°W |
| Insee: | 77372 |
| Postal Code: | 77400 |
| Image Coat Of Arms: | Blason ville fr Pomponne (Seine-et-Marne).svg |
| Image Coat Of Arms Size: | 80px |
| Arrondissement: | Torcy |
| Canton: | Lagny-sur-Marne |
| Mayor: | Arnaud Brunet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Marne et Gondoire |
| Elevation Min M: | 37 |
| Elevation Max M: | 120 |
| Area Km2: | 7.17 |
Pomponne (in French pronounced as /pɔ̃pɔn/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.
The inhabitants are called Pomponnais in French.
On 23 December 1933, the second worst train accident in France occurred in Pomponne with a rear-end collision of Paris-Nancy express and Paris-Strasbourg fast train. 230 people were killed and 300 injured aboard the Nancy express as its 7 wood coaches were smashed. The driver of the Strasbourg train had passed a signal at danger in darkness and fog, but the "Crocodile" acoustic warning system was found to have failed because the contacts had iced over.